Final answer:
The question pertains to the size of a safety cordon around an explosive, presumably set by a Base Defense Operations Center (BDOC). Without context or standard references, it's not possible to provide a definitive answer to the size of this cordon.
The correct answer is none of all.
Step-by-step explanation:
The initial question seems to be related to military or security procedures concerning the establishment of a cordon area around potential explosives. The acronym BDOC could refer to a Base Defense Operations Center or something similar, which would be responsible for establishing a safe perimeter in the case of a suspected explosive.
However, the information provided does not contain any recognized procedure or standard size for a cordon related to 'barrel size explosive or larger.' In military or law enforcement procedures, the size of a cordon is usually determined by multiple factors, including the type and amount of explosive material, the environment, the potential for secondary devices, and the presence of other risks such as shrapnel or hazardous chemicals.
Since the data provided, which includes various measurements in meters, does not align with the format of the question or any standard cordon procedures, it's not possible to determine a correct answer for how large a cordon BDOC will establish without more context or relevant procedural reference.